A 7.2-million-year-old femur found in Bulgaria reveals early signs of upright walking and reopens the debate on human origins.
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Mystery foot fossil may shake up human family tree
Scientists say they have solved the mystery of the Burtele foot, a set of 3.4 million-year-old bones found in Ethiopia in 2009. The fossils, along with others unearthed more recently, have now been ...
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